Question
Answer the following questions:
Explain sex determination in humans.
Explain sex determination in humans.
✓
Answer
Sex Determination in Humans:
- Humans show XY type of sex determining mechanism.
- Out of 23 pair of chromosomes, 22 are autosomes (same in both males and females).
- Females have a pair of X–chromosomes.
- Males have an X and a Y chromosome.
- During spermatogenesis males produce two types of gametes with equal probability – sperm carrying either X or Y chromosome.
- During oogenesis females produce only one types of gamete – having X chromosome.
- An ovum fertilised by the sperm carrying X–chromosome develops into a female (XX) and an ovum fertilised by the sperm carrying Y–chromosome develops into a male (XY).
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